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3 years ago

A particular sample of air is 2.5% water vapor express the concentration of water vapor in parts per million

Chemistry

1 answer:

Inessa05 [86]3 years ago

7 0

Answer:

25000 ppm

Explanation:

<em>Parts Per Million </em>is defined as the number of parts of a solute per one million parts of a solution.

ppm = (Weight of Solute / Weight of Solution) × 10⁶ ---(1)

Let us suppose that the air (solution) weights 100 grams, then 2.5 % of water vapors will have following mass,

Mass of Vapors g / 100 g × 100 = 2.5

Or,

Mass of Vapors = 2.5 × 100 / 100

Mass of Vapors = 2.5 g

Hence, mass of water vapors is 2.5 g.

Now, putting mass of water vapors and air in eq. 1,

ppm = (2.5 / 100) × 10⁶

ppm = 25000

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